Lipomas are non-contagious and are tumorous formations of normal fatty tissue, often found in the limbs and trunk. They generally have clear boundaries, are soft in texture, and may feel cystic without causing pain. Lipomas grow slowly and can sometimes become very large. For most lipomas, observation is sufficient, and diagnosis can be confirmed through ultrasonography. Most patients do not require surgical treatment. However, if there is suspicion of malignancy in deeper lipomas, timely surgical removal is necessary. For lipomas that grow rapidly, cause symptoms, or affect appearance, early surgical intervention is also recommended. If pathology confirms the diagnosis, some lipomas may be liposarcomas. Most can be assessed for risk, and further treatment might be needed.